Spring compressor



'March 17, 192s. 1,530,168

G.'w. GARWOOD SPRING COMPRESSOR Filed se i. 25,1923

1mm in M I position.

Patented Mar. 17, 1925.

UNITED STATES GEORGE W. GAR'WODD, OF EL'MONTE, CALIFORNIA.

SPRING GOMPRESSbRQ Application filed September 25, 1923. Serial No.664,661.

To oiZZ-wlzom it mag concern.

Be it known that I, Gnonen lvqGi-xnwoon, a citizen of the United States,residing at El Monte, inthe county of Los Angeles and State ofCalifornia, have invented new and useful Improvements in SpringCompressors, of which the following is aspecification.

My inventionrelates to valve springcompressors, and a purpose ot myinvention is the provision of a spring compressor of simple, durable andefficient construction which iseasilyoperated to effect the absolutecompression of a spring whereby the return o't the springto 'the valvestem of an engine is facilitated. I

Although I! have herein shown and will describe only one fOIln of springcompressor embodying my invention, it is to be understood that variouschanges and modi- :tications may be made herein without "departing fromthe spirit iofthe invention and thespirit and scope of the appendedclaims.

In. the accompanyinng drawings,

Fig. l is a view showing in perspective one term of spring compressorembodying my invention.

Fig. 2 is a viewlshowing in side elevation and partly in section the'compressor shown in Fig. 1 in applied position! to a support and in theact t effecting the compression of a spring.

Fig. 3 is a view similar to. Fig. 2showing the compressor in springcompressing Fig. 4 is an enlarged detailedperspective view of a valvespring with a retainingyoke in applied position thereto.

Fig. 5 is a detailed perspective view of the retaining yoke. v n

Fig. 6 is a view showing the manner in which the compressed spring isapplied to a valve stem when employing the retaining yoke.

F ig. 7 is a fragmentary view showing in side elevation the springcompressor with the operatinglever andbar in their upper most positions.y g

Similar reference characters refer to similarparts in each of theseveral views.

Referring specifically to the drawings and particularly to Figs. 1, 2and 3, my invention in its present embodiment comprises a base ofelongated form and preferably constructed of metal, one end of the basebeing provided with a downwardly inclined extension 16 which is adaptedto cooperate with an upwardly inclined portion 17 ota movable jaw 18.The jaw 18 also includes a portion 19 the clamping surface of which isdisposed in spaced parallelism to the base 15. Ayoke 20 is secured tothe base 15, and in the present instance such yoke is tormed'ofa singlelength of metal, such as a rod bent substantially in in the form of a U,and including an upright 21 having its lower end extended into the base15 and'secured therein by means of a .pin 22. Therod also includes averticahportion 23 which extends through. and beneat hthe base 15, italso being secured within the base by meansiof a pin'Qt. The

lower end of the portion 23, ispadapted to loosely receive the jaw 18,and awingnut 25 is threadedly mounted on. such portion so as toadjustably support the jaw upon the rod and to move the into clampingrelation with respect to the-base 15. As shown' in Figs. 2 and 3, thebase 15 and the jaw 18 engage the opposite sides of a work bench 26mother suitable support, and by manipulation of the. nut 25 the jaw 18can be moved into clamping relation to the support 26, thereby fixedlysecuring the base 15 to the upper side of the support. In the clampingposition of the jaw 18 the upwardly inclined portion 17 contacts withthe downwardly inclined extension 16 so as to maintain the base 15 andthe portion 19 in spaced parallelism. Mounted for vertical slidingmovemen upon theyoke 20 is a bar 27 provided with openings to slidablyreceive the portions 21 V-shapedsoas to co-operate with an v up-' and 23of the yoke, the opening receiving the wardly ,projectingstild 30 formedin the base 15 for securing a valve spring in proper position upon thebase. That end of the base 15 provided with the stud 30 is formed with asupporting flange 31 which extends transversely ot the base so as toco-operate with the latter and the stud in supporting and positioningthe spring so as to be properly acted upon by the jaw or head 29. 1

The bar 27 is provided adjacent the head 29 with a cam surface 32 whichis adapted to be engaged by a cam 33 formed on the end oi an operatinglever 34. The lever 34 is bolted or otherwise secured to a pair of arms35 adjustably connected tojeach other by a bolt -36 and pivoted upon theyoke 20 at the point indicated at 3T. Bv an adjustment of the bolt36the'arms can be drawn together so as to frictionally engage the yoke20 suiiiciently to retain the arms and consequently the lever 34 inelevated or inactive position. The mounting of the lever 34 is such thatit can be moved downwardly to cause the cam 33 to engage the cam surface32 in effecting a downward movement of the bar 27.

The operation of the compressor is as follows: A valve spring,designated at 38, together with its washer 39 is positioned upon thebase 15 and in surrounding relation to the stud 30, as clearly shown inFig. 2. In order that the spring 88 may be applied, it is necessary thatthe bar 27 be elevated upon the yoke 20. The spring having been applied,the stud 30 operates to properly center in the spring in relation to thehead 29 so that the bar 27 may now be forced downwardly by moving thelever'34 from the position shown in Fig. 2 to that shown in Fig.

With sufiicient downward pressure exerted upon the lever 34, the head 29can be forced downwardly to efi'ect complete compression of thespring38.

In the lowermost position. of the bar 27, as shown in Fig. 3. thetendency of the spring 38 to expand urges the head end of the barupwardly to cause a binding between the bar and the rod 21 of the yoke20 thereby actually preventing upward movement of the bar upon the yoke.;As the bar is now locked against upward movement, it will be clear thatthe lever 34 can be swung clear of the bar without fear of the spring 38moving to expanded position.

lVhile the spring 38 is compressed, a conventional retaining yoke,designated at 40, can be applied to the spring and washer in themannershown in Figs. 3 and 4 so that when the bar 27 is elevated free ofthe spring the latter will be retained in compressed pdsition. Thisretaining yoke also serves to retain the spring in compressed positionwhile the latter is being moved from the compressor and into properposition uponthe valve stem of an engine, as shown in Fig. 6. The bar 27can be moved free of the spring 38 by exerting upward pull upon thehandle 28 thereby shifting the bar longitudinally to remove the bindingengagement between such bar and the rod 21. As previously explained, theopening in the bar 27 for the rod is relatively large, and for thepurpose of allowing of the necessary rocking movement of the bar toeffect its release with respect to the rod 21. It will be understoodthat after the bar 27 has been released, it is 7 then grippedcentrallyof its length whereby it can be readily lifted tree of thespring.

What I claim is:

1. A spring compressor comprising in combination a spring support, aplurality of rods connected to the spring support, and a springcompressing member having two apertures and sliding loosely over saidrods, the said member being adapted to compress a spring seated on thespring support and retain the spring compressed by. jamming on the rods.

2. A spring compressor comprising a plurality of rods, means to clampthe rods'to a table, a spring compressing member having aperturestherethrough' sliding loosely on the rods, and a head portion on thespring compressing member adapted to engage a spring and by the reactionof the spring lever the sliding member into locking engagement with therods.

3. A spring compressor comprising in combination a yoke having aplurality of rods. a spring compressing member having a plurality ofapertures therethrough and sliding looselv on the rods. a cam surface onthe compressing member. a head to engage a spring, and a lever pivotedto the yoke adapted to bear on the cam and thereby compress. the spring.the reaction of the spring on the head levering the compressing memberinto locking engagement with the yoke.

4. A spring compressor comprising a spring support. a yoke. a memberslidable on the yoke to occupy spring compressing position andnon-compressing position. and means for moving the member to springcompressing position, said member being' tormed with an opening toreceive the yoke in such manner that the member is automatically andrleasably secured in spring compressing position under the pressureexerted by the spring on the member.

1 5. A spring compressor comprising a spring support. a yoke. a springcompressin member slidable on the yoke to occupy spring compressingposition or non-compressing position. and manually operable means formoving the member to spring compressing position. and adapted to beremoved .from said member and retained in inoperative position.

6. A spring compressor as embodied in claim 6 wherein the member isslidable on both rods of the yoke so that when moved to springcompressing position the tendency to expand of the spring which iscompressed Will operate to friotiona-lly retain the member in saidposition.

7. A spring compressor comprising a base, a U-shaped yoke supported onthe base, a spring compressing member having openings therein toslidably receive the vertical portions of the yoke, said openings beingformed to allow a limited pivotal movement of the member upon the yoke,and manually operable means engageable With the member for moving thelatter to spring oompressing position, the limited pivotal move ment ofthe member allowing a spring compressed by the member to urge the memberinto binding engagement with the yoke whereby the member is secured inspring compressing position.

8. A spring compressor comprising a base, adjustable means for clampingthe base to a support, a yoke upstanding from the base, a springpositioning stud on the base,a bar slidably mounted on the yoke and insuch manner as to allow the limited pivotal movement of the member,ahead on the member adapted to engage Within the spring to becompressed, and a lever pivotally supported on the yoke and having camengagement With the member for moving the latter to spring compressingposition;

In testimony whereof I have signed my name to this specification.

GEORGE W. GARVOOD.

